19 Animal Species That Vary In Size Immensely.

Although these animals are the same species, the difference between them is huge.

#1. Crabs

The pea crab gets its name because it’s about the size of a pea, and lives mostly inside oysters. The largest crab is the Japanese spider crab with a span of 12 feet and weighing in at 40lbs!

#2. Dolphins

The smallest dolphin is the Maui dolphin measuring at about 5.5 feet and weighing just a little over 100lbs. The Orca is actually the largest dolphin (despite being known as killer whales, which they are not) with a length of about 25 feet and weighing in at around 13,000lbs.

#3. Fish

The smallest fish in the world is the Paedocypris progenetica, at about 1cm in length, while the biggest one is the ocean sunfish or Mola Mola, which averages about 2200lbs, but can get over 5000lbs and a length of 14 feet across the fins.

#4. Foxes

The world’s tiniest fox is the Fennec fox weighin in at 2.5lbs and measuring 8 inches tall. The Red fox is the largest type of fox, weighing up to 30lbs and 20 inches tall.

#5. Frogs

The Paedophryne amauensis is the smallest frog in the world at just 0.3 inches long, and also the smallest known vertebrae. The Goliath frog is the biggest weighing in at 7lbs and just over a foot long.

#6. Horses

Falabella horses weigh as little as 40lbs, while Shire horses can weigh as much as 2400lbs.

#7. Monkeys

The smallest monkey is the Pigmy Marmoset weighing in at a quarter pound and measuring about 6 inches in length. Mandrills are the largest monkeys and they can weigh up to 120lbs.

#8. Octopi

The star pucker pigmy octopus is only half an inch across and weighs 1 gram. The giant octopus weighs about 120lbs and span 20 feet across. The largest ever found weighed 300lbs and spanned 30 feet across.

#9. Rabbits

Pigmy rabbits weigh only 1lb, while Continental Giants are around 15-20lbs , but the biggest one found was about 50lbs and over 4 feet long.

#10. Sharks

The smallest shark is the dwarf lantern shark, which is only 7 inches long. The largest shark is the whale shark which weighs about 20,000lbs and spans 32 feet.

#11. Snakes

The Barbados threadsnake is only 4 inches long, while the green anaconda is about 15 feet in length and weighs about 125lbs.

#12. Spiders

At just half a millimeter long and almost impossible to see with the human eye, the Patu marplesi is the smallest known spider. The biggest one is the giant Huntsman spider which spans about 12 inches across.

#13. Turtles

Speckled tortoises only weight about a quarter pound and are 3.5 inches long. Leatherback sea turtles are the biggest turtles weighing in at 1000lbs and spanning 7 feet. The biggest one ever found weighed 2000lbs and was over 7 feet long.

#14. Whales

The smallest whale is the dwarf sperm whale and weighs about 550lbs and is about 9 feet in length. The blue whale is the largest whale, as well as the largest animal in the world, and can weigh up to 400,000lbs and span 100 feet in length!

#15. Bats

Kitti’s hog nosed bats are the smallest bats with a wingspan of about 5 inches long and weighing in at just about 2 grams. The biggest bats are the Large Flyxing Foxes, and although they only weigh about 2.5lbs, they have a wingspan of about 5 feet.

#16. Birds

The smallest birds in the world are the hummingbirds, weighing about 2 grams, while Ostriches are the biggest at about 250lbs.

#17. Butterflies

Western pygmy blues have a wingspan of about half an inch and Queen Alexandra’s birdwings butterflies come in with a wingspan of almost 10 inches.

#18. Wild Cats

The rusty spotted cat is the smallest wild cat, and only weighs about 2.5lbs. The largest wild cat is the tiger and weighs about 850lbs and 11 feet in length.

#19. Clams

The world’s smallest clam is the genus Waldo (named so because they are extremely hard to find due to their size) and measure less than 5 millimeters in length. The largest clam is the Giant clam and weighs about 450lbs with 4 feet in length.